Nvidia MCP79 chipset: nForce support over Apple Bootcamp

Posted 26 May 2011 - 10:57 AM

dA_KiDMaN

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I've opened this topic for invite all users of Apple Bootcamp to discuss about Nvidia MCP/79 an its implementation over Windows in Dual Boot with MacOS X. Nvidia MCP79 is present in some MacBook Air, MacPro, and Macbook late 2009 and there aren´t enought support for Mac users all over the web.The nVidia support website doesnt give a concrete answer.

The MCP79 belongs to the Nvidia Geforce 9400 Motherboard series as for Notebooks mobo chipset as for Desktop Chipset. On this forum, there are some topics where users are stuck trying to enable Nvidia chipsets fully compatibility with AHCI mode over bootcamp. I'm grateful for the hard work that ludacrisvp and johnsock had been made about this cuestion.

0. My principal objective is to make correctly a installation of nForce drivers over BootCamp with the Ultimate common 64-bit version.

1. "AHCI Mode" in Sata Drive is basic for correct installation of nVidia storage drivers. So I have forced the regedit to manual override the msahci startup. (Changing in regedit values 1 to 0)

2. Then I've forcing Device Manager to load AHCI 1.0 under standard microsoft driver. Succes like other members in this forum.

3. I´ve restarted on MacOS and I succes trying to hack MBR with johnshock's script, then I've extracted MBR using the method here related (url="http://forums.mydigi...dows-and-Linux") to check that modifies has been done. It seems that moddifications on Hexadecimal code are correct and MBR is able to start AHCI support.

4. I restarted on Win7 and no BSOD typical problems and Standard AHCI 1.0 driver provided by Microsoft works.

5. I´ve found a Optimized nForce PACk (http://www.nforcersh...cks-t70915.html) that add more compatible hardware to the nForce and becomes more suitable than the distributed by nVidia. The pach contains Ethernet, SMU Controller and Storage Drivers. But last one never is installed on my MBP. I try to manually add Hardware ID [DEV-0AB5] to the nvstor64.inf but Win rebots with a BSOD when tries to load that driver.

I'm full disoriented at this point and maybe is possible that my Macbook under Snow Leopard OSX does not enter in normal sleep mode due to this changes. I hope this method helps users in the same situation.

Posted 11 June 2011 - 04:29 AM

ludacrisvp

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Nvidia doesn't provide any data sheets that would reveal how their chipset communicates like intel provides, it's all under nda type {censored}. Without this information we cannot change over the sata controller to ahci mode properly it likely needs more changes than the one or two things that we are currently changing with the mbr mods. Until this happens or someone like netkas decides to really dig into the hardware and figure it out it likely will not work in any other mode but IDE. Sorry.